Results 31 to 40 of about 57,485 (211)

Liquid–liquid gravity displacement in a vertical fracture during drilling: Experimental study and mathematical model

Energy Exploration & Exploitation, 2020
Gravity displacement often occurs when drilling a vertical fractured formation, causing a downhole complexity with risk of blowout and reservoir damage, well control difficulty, drilling cycle prolongation, and increased costs.
Dong Xiao, Yingfeng Meng, Xiangyang Zhao, Gao Li, Jiaxin Xu   +4 more
doaj   +1 more source

History-sensitive accumulation rules for life-time prediction under variable loading [PDF]

, 2011
This is the post-print version of the article. The official published version can be obtained from the link below - Copyright @ 2011 SpringerA general form of temporal strength conditions under variable creep loading is employed to formulate several new ...
A. Il’ushin, A. Lokoshchenko, A.V. Kashtanov, A.V. Kashtanov, D. Marriott, E. Robinson, E. Robinson, F.A. Leckie, I. V. Namestnikova, L.P. Isupov, N. Morozov, R. Gomuc, R. Penny, R.M. Goldhoff, S. E. Mikhailov, S.E. Mikhailov, S.E. Mikhailov, S.E. Mikhailov, T. Bui-Quoc, V. Nikiforovsky, V. Nikiforovsky   +20 more
core   +1 more source

Optimized clinical practice for superaged patients with hip fracture: significance of damage control and enhanced recovery program

Burns & Trauma, 2019
With the advent of global aging, the incidence, mortality, and medical costs of hip fracture among aged patients are increasing annually. The number of controlled clinical studies and health economics analyses that conform to evidence-based medicine ...
Zaiyang Liu, Jun Zhang, Kaiqi He, Yumei Zhang, Yuan Zhang   +4 more
doaj   +1 more source

New tension-compression damage model for complex analysis of concrete structures [PDF]

, 2016
A new damage model, based on continuum damage mechanics and simulating the opening, closing, and reopening of cracks in concrete using only one surface of discontinuity, is proposed in this article.
Barbat Barbat, Horia Alejandro, Oller Martínez, Sergio Horacio, Paredes, Jairo A.   +2 more
core   +2 more sources

Mean Stress Effect on the Axial Fatigue Strength of DIN 34CrNiMo6 Quenched and Tempered Steel

Metals, 2018
The present study consists of a theoretical and experimental investigation of the effect of axial mean stresses on the high cycle fatigue behaviour of DIN 34CrNiMo6 high strength steel in quenched and tempered conditions.
Luis Pallarés-Santasmartas, Joseba Albizuri, Alexander Avilés, Rafael Avilés   +3 more
doaj   +1 more source

Analytical and Experimental Investigation into Pre-Stressed Carbon Fiber Reinforced Polymer (CFRP) Fatigue Retrofits for Steel Waterway Lock-Gate Structures

Metals, 2022
Lock gates are an important part of the transportation infrastructure within the United States (US). Unfortunately, many existing lock gates have reached or exceeded their initial design lives and require frequent repairs to remain in service ...
Christine Lozano, Maggie Langston, Mohammad H. Kashefizadeh, Gary S. Prinz   +3 more
doaj   +1 more source

Statistical Physics of Rupture in Heterogeneous Media [PDF]

, 2005
The damage and fracture of materials are technologically of enormous interest due to their economic and human cost. They cover a wide range of phenomena like e.g.
Sornette, D.
core   +3 more sources

Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables

Fracture and Structural Integrity, 2020
Equivalent single layer theories for layered beams effectively and accurately predict global displacements and internal force and moment resultants using a limited number of displacement variables.
Roberta Massabò, Ilaria Monetto
doaj   +1 more source

Linear and non-linear dynamic analyses of sandwich panels with face sheet-tocore debonding [PDF]

, 2020
А survey of recent developments in the dynamic analysis of sandwich panels with face sheet-to-core debonding is presented. The finite element method within the ABAQUSTM code is utilized.
Burlayenko, V. N., Sadowski, Tomasz
core  

Damage Characteristics of Surrounding Rock Subjected to VCR Mining Blasting Shock

Shock and Vibration, 2015
For limiting the damage range caused by explosive shock loads in vertical crater retreat (VCR) mining, the blasting damage characteristics of surrounding rock were studied by two methods: numerical simulation and ultrasonic testing.
Nan Jiang, Chuanbo Zhou, Xuedong Luo, Shiwei Lu   +3 more
doaj   +1 more source